<HTTP_REQUEST> - Out of bounds (line 1) - randomly in ltm log file

No RAM cache or WAM.

Could it be some sort of issue between having 'XFF' enabled in the HTTP Profile as well as the iRule to scrub the HTTP header and re-insert it?

Here is a snippet of the virtual-servers (80 & 443) as well as the HTTP Profile.

80/443 virtual-servers:

  
  ltm virtual xxxx-production-xxxx-1.2.3.4-tcp-80-vs {  
      destination 1.2.3.4:http  
      ip-protocol tcp  
      mask 255.255.255.255  
      partition xxxx  
      pool xxxx-production-xxxx-pool  
      profiles {  
          /Common/shared/http-xxxx-optimized { }  
          /Common/shared/tcp-xxxx-optimized { }  
      }  
      rules {  
          /Common/shared/x_forwarded_for  
      }  
      snatpool /Common/shared/internal-snat  
      vlans-disabled  
  }  
  ltm virtual xxxx-production-xxxx-1.2.3.4-tcp-443-vs {  
      destination 1.2.3.4:https  
      ip-protocol tcp  
      mask 255.255.255.255  
      partition xxxx  
      pool xxxx-production-xxxx-pool  
      profiles {  
          /Common/shared/http-xxxx-optimized { }  
          /Common/shared/tcp-xxxx-optimized { }  
          wildcard.xxxx.bogus.com-clientssl {  
              context clientside  
          }  
      }  
      rules {  
          /Common/shared/https_proto_header  
          /Common/shared/x_forwarded_for  
      }  
      snatpool /Common/shared/internal-snat  
      vlans-disabled 

 ltm profile http http-xxxx-optimized { 
     adaptive-parsing enabled 
     app-service none 
     basic-auth-realm none 
     defaults-from /Common/http 
     description none 
     encrypt-cookie-secret none 
     encrypt-cookies none 
     fallback-host none 
     fallback-status-codes none 
     header-erase none 
     header-insert none 
     insert-xforwarded-for enabled 
     lws-separator none 
     lws-width 80 
     max-header-count 64 
     max-header-size 65536 
     max-requests 0 
     oneconnect-transformations disabled 
     partition Common 
     pipelining enabled 
     redirect-rewrite none 
     request-chunking preserve 
     response-chunking selective 
     response-headers-permitted none 
     security disabled 
     via-host-name none 
     via-request preserve 
     via-response preserve 
 }